I have a 2016 MX-5 ND1. I have had 2 different base tunes from other companies. They seemed to be leaving me short on performance for the exhaust work I have added. Especially on Track Days it just seemed sluggish. I have GWR's 421 header, max mid-pipe and SQHV muffler. Bryan sent me the instructions for logging data. I went to CMP Track Day the on Wednesday and WOW!!!! What a difference. Even with my A/T, the improvements were substantial. FAB9 is definitely on top of the tuning platform!